[stable] prepare Rust 1.93.1

RELEASES.md

@@ -1,45 +1,49 @@
-Version 1.93 (2026-01-22)
+Version 1.93.1 (2026-02-12)
+===========================
+
+<a id="1.93.1"></a>
+
+- [Don't try to recover keyword as non-keyword identifier](https://github.com/rust-lang/rust/pull/150590), fixing an ICE that especially [affected rustfmt](https://github.com/rust-lang/rustfmt/issues/6739).
+- [Fix `clippy::panicking_unwrap` false-positive on field access with implicit deref](https://github.com/rust-lang/rust-clippy/pull/16196).
+- [Revert "Update wasm-related dependencies in CI"](https://github.com/rust-lang/rust/pull/152259), fixing file descriptor leaks on the `wasm32-wasip2` target.
+
+Version 1.93.0 (2026-01-22)
 ==========================
 
-<a id="1.93-Language"></a>
+<a id="1.93.0-Language"></a>
 
 Language
 --------
-- [Add warn-by-default `function_casts_as_integer` lint](https://github.com/rust-lang/rust/pull/141470)
-- [Add future-incompatibility warning for `...` function parameters without a pattern outside of `extern` blocks](https://github.com/rust-lang/rust/pull/143619)
 - [Stabilize several s390x `vector`-related target features and the `is_s390x_feature_detected!` macro](https://github.com/rust-lang/rust/pull/145656)
 - [Stabilize declaration of C-style variadic functions for the `system` ABI](https://github.com/rust-lang/rust/pull/145954)
 - [Emit error when using some keyword as a `cfg` predicate](https://github.com/rust-lang/rust/pull/146978)
-- [Introduce future-compatibility warning for `repr(C)` enums whose discriminant values do not fit into a `c_int` or `c_uint`](https://github.com/rust-lang/rust/pull/147017)
-- [Introduce future-compatibility warning against ignoring `repr(C)` types as part of `repr(transparent)`](https://github.com/rust-lang/rust/pull/147185)
 - [Stabilize `asm_cfg`](https://github.com/rust-lang/rust/pull/147736)
-- [Upgrade the `deref_nullptr` lint from warn-by-default to deny-by-default](https://github.com/rust-lang/rust/pull/148122)
 - [During const-evaluation, support copying pointers byte-by-byte](https://github.com/rust-lang/rust/pull/148259)
-- [Add warn-by-default `const_item_interior_mutations` lint to warn against calls which mutate interior mutable `const` items](https://github.com/rust-lang/rust/pull/148407)
 - [LUB coercions now correctly handle function item types, and functions with differing safeties](https://github.com/rust-lang/rust/pull/148602)
 - [Allow `const` items that contain mutable references to `static` (which is *very* unsafe, but not *always* UB)](https://github.com/rust-lang/rust/pull/148746)
+- [Add warn-by-default `const_item_interior_mutations` lint to warn against calls which mutate interior mutable `const` items](https://github.com/rust-lang/rust/pull/148407)
+- [Add warn-by-default `function_casts_as_integer` lint](https://github.com/rust-lang/rust/pull/141470)
 
 
-<a id="1.93-Compiler"></a>
+<a id="1.93.0-Compiler"></a>
 
 Compiler
 --------
 - [Stabilize `-Cjump-tables=bool`](https://github.com/rust-lang/rust/pull/145974). The flag was previously called `-Zno-jump-tables`.
-- [Promote `riscv64a23-unknown-linux-gnu` to Tier 2 (without host tools)](https://github.com/rust-lang/rust/pull/148435)
 
-
-<a id="1.93-Platform-Support"></a>
+<a id="1.93.0-Platform-Support"></a>
 
 Platform Support
 ----------------
 
+- [Promote `riscv64a23-unknown-linux-gnu` to Tier 2 (without host tools)](https://github.com/rust-lang/rust/pull/148435)
 
 Refer to Rust's [platform support page][platform-support-doc]
 for more information on Rust's tiered platform support.
 
 [platform-support-doc]: https://doc.rust-lang.org/rustc/platform-support.html
 
-<a id="1.93-Libraries"></a>
+<a id="1.93.0-Libraries"></a>
 
 Libraries
 ---------
@@ -49,14 +53,14 @@ Libraries
 - [Don't require `T: RefUnwindSafe` for `vec::IntoIter<T>: UnwindSafe`](https://github.com/rust-lang/rust/pull/145665)
 
 
-<a id="1.93-Stabilized-APIs"></a>
+<a id="1.93.0-Stabilized-APIs"></a>
 
 Stabilized APIs
 ---------------
 
-- [`<MaybeUninit<T>>::assume_init_drop`](https://doc.rust-lang.org/stable/core/mem/union.MaybeUninit.html#method.assume_init_drop)
-- [`<MaybeUninit<T>>::assume_init_ref`](https://doc.rust-lang.org/stable/core/mem/union.MaybeUninit.html#method.assume_init_ref)
-- [`<MaybeUninit<T>>::assume_init_mut`](https://doc.rust-lang.org/stable/core/mem/union.MaybeUninit.html#method.assume_init_mut)
+- [`<[MaybeUninit<T>]>::assume_init_drop`](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.assume_init_drop)
+- [`<[MaybeUninit<T>]>::assume_init_ref`](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.assume_init_ref)
+- [`<[MaybeUninit<T>]>::assume_init_mut`](https://doc.rust-lang.org/stable/core/primitive.slice.html#method.assume_init_mut)
 - [`<[MaybeUninit<T>]>::write_copy_of_slice`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.write_copy_of_slice)
 - [`<[MaybeUninit<T>]>::write_clone_of_slice`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.write_clone_of_slice)
 - [`String::into_raw_parts`](https://doc.rust-lang.org/stable/std/string/struct.String.html#method.into_raw_parts)
@@ -67,9 +71,9 @@ Stabilized APIs
 - [`<uN>::unchecked_shl`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unchecked_shl)
 - [`<uN>::unchecked_shr`](https://doc.rust-lang.org/stable/std/primitive.usize.html#method.unchecked_shr)
 - [`<[T]>::as_array`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_array)
-- [`<[T]>::as_array_mut`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_mut_array)
+- [`<[T]>::as_mut_array`](https://doc.rust-lang.org/stable/std/primitive.slice.html#method.as_mut_array)
 - [`<*const [T]>::as_array`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.as_array)
-- [`<*mut [T]>::as_array_mut`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.as_mut_array)
+- [`<*mut [T]>::as_mut_array`](https://doc.rust-lang.org/stable/std/primitive.pointer.html#method.as_mut_array)
 - [`VecDeque::pop_front_if`](https://doc.rust-lang.org/stable/std/collections/struct.VecDeque.html#method.pop_front_if)
 - [`VecDeque::pop_back_if`](https://doc.rust-lang.org/stable/std/collections/struct.VecDeque.html#method.pop_back_if)
 - [`Duration::from_nanos_u128`](https://doc.rust-lang.org/stable/std/time/struct.Duration.html#method.from_nanos_u128)
@@ -79,15 +83,15 @@ Stabilized APIs
 - [`std::fmt::FromFn`](https://doc.rust-lang.org/stable/std/fmt/struct.FromFn.html)
 
 
-<a id="1.93-Cargo"></a>
+<a id="1.93.0-Cargo"></a>
 
 Cargo
 -----
 - [Enable CARGO_CFG_DEBUG_ASSERTIONS in build scripts based on profile](https://github.com/rust-lang/cargo/pull/16160/)
 - [In `cargo tree`, support long forms for `--format` variables](https://github.com/rust-lang/cargo/pull/16204/)
 - [Add `--workspace` to `cargo clean`](https://github.com/rust-lang/cargo/pull/16263/)
 
-<a id="1.93-Rustdoc"></a>
+<a id="1.93.0-Rustdoc"></a>
 
 Rustdoc
 -----
@@ -97,7 +101,7 @@ Rustdoc
 - [Validate usage of crate-level doc attributes](https://github.com/rust-lang/rust/pull/149197).  This means if any of `html_favicon_url`, `html_logo_url`, `html_playground_url`, `issue_tracker_base_url`, or `html_no_source` either has a missing value, an unexpected value, or a value of the wrong type, rustdoc will emit the deny-by-default lint `rustdoc::invalid_doc_attributes`.
 
 
-<a id="1.93-Compatibility-Notes"></a>
+<a id="1.93.0-Compatibility-Notes"></a>
 
 Compatibility Notes
 -------------------
@@ -108,6 +112,10 @@ Compatibility Notes
 - Cargo now sets the `CARGO_CFG_DEBUG_ASSERTIONS` environment variable in more situations. This will cause crates depending on `static-init` versions 1.0.1 to 1.0.3 to fail compilation with "failed to resolve: use of unresolved module or unlinked crate `parking_lot`". See [the linked issue](https://github.com/rust-lang/rust/issues/150646#issuecomment-3718964342) for details.
 - [User written types in the `offset_of!` macro are now checked to be well formed.](https://github.com/rust-lang/rust/issues/150465/)
 - `cargo publish` no longer emits `.crate` files as a final artifact for user access when the `build.build-dir` config is unset
+- [Upgrade the `deref_nullptr` lint from warn-by-default to deny-by-default](https://github.com/rust-lang/rust/pull/148122)
+- [Add future-incompatibility warning for `...` function parameters without a pattern outside of `extern` blocks](https://github.com/rust-lang/rust/pull/143619)
+- [Introduce future-compatibility warning for `repr(C)` enums whose discriminant values do not fit into a `c_int` or `c_uint`](https://github.com/rust-lang/rust/pull/147017)
+- [Introduce future-compatibility warning against ignoring `repr(C)` types as part of `repr(transparent)`](https://github.com/rust-lang/rust/pull/147185)
 
 
 Version 1.92.0 (2025-12-11)

compiler/rustc_parse/src/parser/item.rs

@@ -393,6 +393,7 @@ impl<'a> Parser<'a> {
         let insert_span = ident_span.shrink_to_lo();
 
         let ident = if self.token.is_ident()
+            && self.token.is_non_reserved_ident()
             && (!is_const || self.look_ahead(1, |t| *t == token::OpenParen))
             && self.look_ahead(1, |t| {
                 matches!(t.kind, token::Lt | token::OpenBrace | token::OpenParen)

src/ci/docker/host-x86_64/dist-various-2/Dockerfile

@@ -85,9 +85,9 @@ RUN /tmp/build-fuchsia-toolchain.sh
 COPY host-x86_64/dist-various-2/build-x86_64-fortanix-unknown-sgx-toolchain.sh /tmp/
 RUN /tmp/build-x86_64-fortanix-unknown-sgx-toolchain.sh
 
-RUN curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-29/wasi-sdk-29.0-x86_64-linux.tar.gz | \
+RUN curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-27/wasi-sdk-27.0-x86_64-linux.tar.gz | \
   tar -xz
-ENV WASI_SDK_PATH=/tmp/wasi-sdk-29.0-x86_64-linux
+ENV WASI_SDK_PATH=/tmp/wasi-sdk-27.0-x86_64-linux
 
 COPY scripts/freebsd-toolchain.sh /tmp/
 RUN /tmp/freebsd-toolchain.sh i686

src/ci/docker/host-x86_64/pr-check-2/Dockerfile

@@ -21,9 +21,9 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
   mingw-w64 \
   && rm -rf /var/lib/apt/lists/*
 
-RUN curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-29/wasi-sdk-29.0-x86_64-linux.tar.gz | \
+RUN curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-27/wasi-sdk-27.0-x86_64-linux.tar.gz | \
   tar -xz
-ENV WASI_SDK_PATH=/wasi-sdk-29.0-x86_64-linux
+ENV WASI_SDK_PATH=/wasi-sdk-27.0-x86_64-linux
 
 ENV RUST_CONFIGURE_ARGS="--set rust.validate-mir-opts=3"
 

src/ci/docker/host-x86_64/test-various/Dockerfile

@@ -41,9 +41,9 @@ WORKDIR /
 COPY scripts/sccache.sh /scripts/
 RUN sh /scripts/sccache.sh
 
-RUN curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-29/wasi-sdk-29.0-x86_64-linux.tar.gz | \
+RUN curl -L https://github.com/WebAssembly/wasi-sdk/releases/download/wasi-sdk-27/wasi-sdk-27.0-x86_64-linux.tar.gz | \
   tar -xz
-ENV WASI_SDK_PATH=/wasi-sdk-29.0-x86_64-linux
+ENV WASI_SDK_PATH=/wasi-sdk-27.0-x86_64-linux
 
 ENV RUST_CONFIGURE_ARGS \
   --musl-root-x86_64=/usr/local/x86_64-linux-musl \
@@ -56,9 +56,9 @@ ENV RUST_CONFIGURE_ARGS \
 ENV NO_DEBUG_ASSERTIONS=1
 ENV NO_OVERFLOW_CHECKS=1
 
-RUN curl -L https://github.com/bytecodealliance/wasmtime/releases/download/v38.0.4/wasmtime-v38.0.4-x86_64-linux.tar.xz | \
+RUN curl -L https://github.com/bytecodealliance/wasmtime/releases/download/v19.0.0/wasmtime-v19.0.0-x86_64-linux.tar.xz | \
   tar -xJ
-ENV PATH "$PATH:/wasmtime-v38.0.4-x86_64-linux"
+ENV PATH "$PATH:/wasmtime-v19.0.0-x86_64-linux"
 
 ENV WASM_WASIP_TARGET=wasm32-wasip1
 ENV WASM_WASIP_SCRIPT python3 /checkout/x.py --stage 2 test --host='' --target $WASM_WASIP_TARGET \

src/tools/clippy/clippy_lints/src/unwrap.rs

@@ -180,14 +180,19 @@ impl Local {
                 field_indices,
                 ..
             } => {
+                let field_projections = place
+                    .projections
+                    .iter()
+                    .filter(|proj| matches!(proj.kind, ProjectionKind::Field(_, _)))
+                    .collect::<Vec<_>>();
                 is_potentially_local_place(*local_id, place)
                     // If there were projections other than field projections, err on the side of caution and say that they
                     // _might_ be mutating something.
                     //
                     // The reason we use `<=` and not `==` is that a mutation of `struct` or `struct.field1` should count as
                     // mutation of the child fields such as `struct.field1.field2`
-                    && place.projections.len() <= field_indices.len()
-                    && iter::zip(&place.projections, field_indices.iter().copied().rev()).all(|(proj, field_idx)| {
+                    && field_projections.len() <= field_indices.len()
+                    && iter::zip(&field_projections, field_indices.iter().copied().rev()).all(|(proj, field_idx)| {
                          match proj.kind {
                             ProjectionKind::Field(f_idx, _) => f_idx == field_idx,
                                 // If this is a projection we don't expect, it _might_ be mutating something

src/tools/clippy/tests/ui/checked_unwrap/simple_conditionals.rs

@@ -472,3 +472,22 @@ fn issue15321() {
         //~^ unnecessary_unwrap
     }
 }
+
+mod issue16188 {
+    struct Foo {
+        value: Option<i32>,
+    }
+
+    impl Foo {
+        pub fn bar(&mut self) {
+            let print_value = |v: i32| {
+                println!("{}", v);
+            };
+
+            if self.value.is_none() {
+                self.value = Some(10);
+                print_value(self.value.unwrap());
+            }
+        }
+    }
+}

src/version

@@ -1 +1 @@
-1.93.0
+1.93.1